Vimeo - When clicking play, the site will scroll up to fit the video in the browser window.
YouTube - The play icon changes to a replay icon at the end of the video.
Highrise iPhone app - As it loads your account’s database, it presents you with a playable game of tic tac toe.
CNNArabic - Even the “Play” button has direction from right to left.
Rdio - When you mouse over the forward/back buttons on the Rdio player, it tells you what track is coming up next in the playlist/album.
Youtube - Allows user to play snake with keyboard arrows while waiting for video to load or when it’s paused.
houseofbuttons - Playtime of song visualized in button (unknown source)